PEEP 0	PEEP 4	P
SpO2mean (%)	93.4 ±1.53	93.7±2.1	0.32
ODI (n/h)	1.4 (IQR 0.8-2.8)	1.9 (IQR 0.2-3.9)	0.84
T<90% (%)	1.0 (IQR 0.0-2.8)	0.5 (IQR 0.0-4.3)	0.85
Lowest SpO2 (%)	80.3±5.7	80.1±7.1	0.88
PtcCO2mmHg	39.9±4.7	41.6±3.8	0.13
Abnormal Respiratory Events (n/h)	1.9 (IQR 0.2-7.8)	1.0 (IQR 0.2-9.5)	0.66
Total Sleep Time (min)	325.1±65.6	322.9±65.1	0.90
Sleep efficiency (%)	71.8±9.5	73.7±8.9	0.46
Stage N1 (% TST)	32.9±22.4	30.4±20.0	0.58
Stage N2 (% TST)	41.7±18.2	47.2±15.6	0.16
Stage N3 (% TST)	2.5 (IQR 0.0-19.0)	0.0 (IQR 0.0-14.9)	0.03
Stage R (%	16.0±7.0	15.2±8.8	0.61
Ar/Aw I (n/h)	14.7±5.1	18.3±7.1	0.07
Autotriggerings (n/h)	0.3 (IQR 0.0-2.3)	2.0 (IQR0.7-8.0)	0.0085
Ineffective efforts (n/h)	0.3 (IQR 0.0-0.7)	0.3 (IQR 0.0-5.0)	0.57
Leaks (%)	32.0±29.7	46.1±31.8	0.0004